Title :
Effects of HPA nonlinearity on frequency multiplexed OFDM signals
Author :
Banelli, Paolo ; Baruffa, Giuseppe ; Cacopardi, Saverio
Author_Institution :
Dept. of Electron. & Inf. Eng., Perugia Univ., Italy
fDate :
6/1/2001 12:00:00 AM
Abstract :
The paper analyzes the performance of the downlink channel of a multimedia interactive service system which transmits the desired information by the frequency multiplexing of several OFDM signals compliant with the DVB-T standard. The effects of the nonlinear distortions introduced by a high power amplifier on the system performance are evaluated both in terms of the bit error rate (BER) degradation in AWGN channels and of the spectral regrowth. The performance comparison to the case of a single DVB-T signal as well as the benefits of an ideal predistortion is also considered by comparing analytical results to computer simulations
Keywords :
AWGN channels; OFDM modulation; cellular radio; digital video broadcasting; error statistics; frequency division multiplexing; interactive systems; multimedia communication; nonlinear distortion; power amplifiers; radio access networks; radio links; radiofrequency amplifiers; AWGN channels; BER degradation; CABSINET project; DVB-T signal; DVB-T standard; HPA nonlinearity; LMDS system; bit error rate; broadband access system; computer simulations; downlink channel; frequency multiplexed OFDM signals; high power amplifier; macro-cells; multimedia interactive service system; nonlinear distortions; performance analysis; predistortion; spectral regrowth; system performance; Bit error rate; Digital video broadcasting; Downlink; Frequency division multiplexing; Information analysis; Multimedia systems; Nonlinear distortion; OFDM; Performance analysis; Signal analysis;
Journal_Title :
Broadcasting, IEEE Transactions on
